package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;
    @Override
    public void deleteById(Long id) {
        //判断分类中是否有菜品
        LambdaQueryWrapper<Dish> dishLqw = new LambdaQueryWrapper<>();
        dishLqw.eq(Dish::getCategoryId,id);
        int dishCount = dishService.count(dishLqw);
        if (dishCount > 0){
            throw new CustomException("当前分类下关联了菜品，不能删除");
        }
        //判断分类中是否有套餐
        LambdaQueryWrapper<Setmeal> SetmealLqw = new LambdaQueryWrapper<>();
        SetmealLqw.eq(Setmeal::getCategoryId,id);
        int setmealCount = setmealService.count(SetmealLqw);
        if (setmealCount > 0){
            throw new CustomException("当前分类下关联了套餐，不能删除");
        }
        //  删除分类
        removeById(id);


    }
}
